Doffing roll for carding machines



Sept. my 1929. E. a.. QADY DOFFING ROLL FOR CARDING MACHINES Original Filed Aug. 4, 1925 2 SheetsSheet 2 Sheets-Sheer?, 2

Sept. l0, 1929, E. n.. CADY v DOFFING ROLL FOR CARDING MACHINES Original Filed Aug. 4, 1925 Patented Sept'. 10, 1929.

UNITED STATES PATENT OFFICE.

ERNESJTL: CADY, OF HARTFORD, CONNECTICUT, ASSIGNOR TO THE IE.v L. CADY ENGI- NEERING COMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION OF CON- NECTICUT.

IDOFFING- ROLL FOB CARDING MACHINES.

Application filed August 4, 1925, Serial No. 48,071. Renewed February 1, 1929.

rlhis invention relates to carding machines and particularly' to an improved form of doifng roll adapted to facilitate carding operations upon materials having extremely short libres.

An object of the present invention is to provide a dolfer roll of the ring type .having card clothing thereonl and also having members interposed between the needles lof the card clothing adapted to aid in removing the libres being carded from the needles of the doii'er on to the condenser bands.

Another object of importance is to provide means for moving the members interposed between the needles of the card clothing longitudinally of the needles in timed relation to the rotation of the doling roll so` that the fibres may be loaded upon the needles at one point and forced from said needles at 2o another point.

y One feature of importance which enables me to accomplish the above named objects is that independent members are interposed between the card clothing needles extending across the width of the needles on each ring. Between the rings of needles are bands or rings for retaining the members in operative poslt-ionvand means for actuating them durf ing rotation of the doling roll.

3e Another feature of importance is that eccentric means relative to the rings of cardl clothing on the doiling roll and having means .interposed between'itself. and the bands are provided to actuate the members during the rotation of the dofer roll.

. In dofer rolls as heretofore employed, l spaced rings of card clothing are mounted on a small cylinder or roll which rotates adjacent a large cylinder on which fibres are laid. The

tation of the roll-and large cylinder strips the fibres from the card clothing on the large cylinder. The ringsI of card clothing on the doler roll then give up the fibres being carded to condensers usually in the form of wide belts `between4 ,which the 'fibres are worked while the beltsare'vibrated laterally. The

above method of doiing fibres at the end of the carding voperation is satisfactory for fibres'of long orfairlylong staple. In the case ladapted to aid the fibres in being stripped card clothing on the doffer roll during roof shortstaple material, such as asbestos, wood pulp or other materials, fibres of longer staple are required to be added by being mixed with the material being carded for satisfactory operation. In the case of asbestos this is a serious disadvantage as no other material having fibers of 'long staple exists having similar fire-resisting properties. It 1s particularly desirable, therefore, in the case'of carding asbestos to provide means whereby the carding operation can be carried out with pure asbestos, that is, without the addition of cotton, hemp or other fibres of longer staple. e

In operations upon materials of short staple the difficult has not been in the carding process itself ut rather in withdrawing the libres from the doffer rolls and placing them upon the condenser rolls in continuous strips. Applicants invention therefore resides in the doliing roll of a carding machine and more especially in a dofting roll provided with members movable relative to the needles of the card clothing during rotation and from the needles of the doiiing roll and con veyed to the condenser. Also, this is 'accomplished without subjecting the fibres, as they are beingstripped from the dol'er needles, to tension sufficient to separate them.

At all timesl while the fibres are on the doiiing roll they are being pushed or forced outwardly along the needles of the card clothing by the outward movement of end surfaces of the interposed members. These end surfaces are such that the fibres can rest upon them and their removal from the needles is without subjecting the fibres to any tend. ency to separate.

' With the above and other objects in view my invention consists in the features of construction and operation set forth in the following specifieation and illustrated in the accompanying drawings.

In the accompanying drawings annexed hereto and forming a part of this specification, I haveshown my invention embodied otherwise embodied and that fthe drawings 100 the carding machine cylinder and the dofiing roll, showing the position of the members interposed, between the needles when the fibres are being laid upon the doti-ing roll.

Fig. 4 is a view on the same scale as Fig. 3 showing the doiing roll and condenser, the interposed members being positioned after stripping theY bres from the dofing roll needles so that they may move on tothe condenser bands.

Fig.` 5 is a longitudinal sectional-view of the dofling roll taken on line 5 5 of Fig. 1'.

Fig. 6 is a similar sectional view taken on lin 6-6 of Fig. 1; and

Fi 7 is a perspective view of the interpose members and their retaining and actuating member, the doihng roll and its card clothing being removed.

. In the above-mentioned drawings, I have shown but one embodiment of the invention which is now deemed preferable, but it is to be understood that changesand modifications may be made within the scope of the appended claims without departing from the spirit of the invention.

Briefly, and in its broadest aspect, my invention comprises the following principal parts, .first a doning cylinder having applied thereto spaced rings of card clothing, second, members disposed between the needles of said clothing and lying substantially parallel to said rows of needles, third, lateral extensions on the sides of said members adapted to be engaged by rings or bands to retain them in position, fourth, a cylinder ldisposed within and eccentrically relative to said dofng cylinder and, fifth, means extending through said doiing cylinder and engaging said eccentric cylinder and said rings so that the members between the needles of the card clothing are movable Vsubstantially radially of the domng cylinder during rotation of the dohng cylinder.

Referring more in particular to the figures of the drawings I provide, a doiiing cylinder 10 for a carding machine mounted, as usually found in these machines, adjacent the cenA tral large cylinder 11 of the machine. The doiiing cylinder or roll 10 comprises a metal tube or cylinder "1.2 and oppositely disposed heads 13' at its ends, one of which is shown in Figs. 1 and 2. These heads 13 may be( provided with journal portions 14 adapted to be rotatable within bearings provided in standards 15. Preferably and as shown in the iigures, the heads 13 have a central opening through their ljournal portions for a purpose which will be defined hereinafter.

Surrounding the metal tube 12 are secured, as by screws 12a, wooden strips 16 to which the card clothing 17 is attached. Thisfcard clothing 17, as usual in ring doing types of carding machines, is in the form of rings or circular strips extending entirely around the cylinder but suitably spaced apart. Adjacent the doiing cylinder 1() are the condenser rolls 18 over which extend wide leather bands 19 between which the fibres pass after leaving the dofling cylinder 10. These rolls 18 are adapted to be rotated and simultaneously moved axially in the usual manner. Disposed between the needles so that they always extendl partially within the space between the needles I are spaced members 20 formed of sheet metal and of a height substantially less than that of the needles. These members 20 which are of plate-like form are provided with lateral extensions 21 on opposite sides JAs shown, the body portions of the members are approximately as wide as the rings 17 of card clothing and the lateral projections 21 extend into the spaces between the strips of card clothing 17. Inserted within these spaces are metal rings 22 upon which the projections 21 are adapted to rest- Surrounding the rings 22 and bearing upon the outer surfaces of the projections 21 are metal rings 23. It will be seen from this construction that the interposed members 20 are held in position between the needles of the card clothing 17 by means of the inner or ,outer rings or bands 22 and 23. In the drawings a member 20 is shown as being disposed obliquely between each row of needles. It will be understood however that lmembers 20 may bedisposed between alternate, Yevery third, or any other number of. rows of needles if desired and if the fibres do not require additional support.

Within the metal cylinder 12 is another cylinder 25 also preferably of metal and supported upon heads 26- at opposite ends, one only being shown in Fig. 2. The heads 26 are carried upon a shaft 27 rotatably mounted in any suitable bearings (not shown). The osition of this cylinder 25 relative to cylinder 12 is clearly indicated in Fig. 1 as being eccentric thereto. The axis of cylinder 25 is directly away from the main cylinder 11 of the machine and toward the condenser rolls 18. The axes of the cylinders 12 vandr25 are therefore substantially in a horizontal plane and parallel to each other.

' Disposed loosely in suitable apertures extending through the cylinder 12 and through the wooden strips 16 so that they may move freely therethrough are spacers or pins 3() their-inner ends adapted to rest upon the e engao'e the inner surface of fore be forced outward along the needles b cylinder 25 and their outer ends adapted to the rings or bands 22. otation of the cylinders 12 and 25 will -therefore cause the pins 30 to move inward and outward and move the bands 22 and the parts supported thereon relative to the cylinder 12 and card clothing 17 due to the eccentricity of these cylinders. The members 2() will be withdrawn inwardly at that portion of the dofting cylinder 12 towa-rd the main cylinder 11 and will be extended outwardly beyond theends of the needles of the card clothing 17 at the opposite side and toward the condenser 18. Preferably the cylinders 12 and 25 -are simultaneously rotated so that the pins 30 do not frictionally engage and slide over the surfaces of the cylinder 25 and the rings 22.

The members 20 are of greater length than the distance they are moved radially of the cylinder 12 or along the needles of clothing 17. Portions of these members will therefore always be within the space directly between the needles. Y

Positioned below the cylinders 12 and 25 is a plain cylindrical roll 32 adapted to lightly contact with or just clear the card clothin riphery of cylinder 12 at w ich the roll 32 is placed the members 20 are moving outwardly relative to the needles of the' card clothing and their outer edges are substantially even with the outer free ends of the needles. The libres on the needles will theremovement of these members 20 and will be compressed and compacted by the roller 32 prior to their being advanced to the condenser strips or bands 19.

Beyond the roller 32 the members 20 continue to .move outward and, when the condenser bands 19 are reached, the closely compacted bres are entirely free from the needles of the clothing 17. They are therefore supported upon the adjacent` end surfaces of the members 2O ready to move directly onto the condenser bands 19 without any tendency of the card clothing needles separating them or subjecting them to tension. The operation of the above described construction is substantially as follows: The fibres being carded are carried by the main cylinder 11, after having been operated on by the usual strippers and worker rolls with which the carding machine is provided, toA

the card clothing 17 on the doffing ,roll 12. Usually two or more of these dolling rolls or cylinders 12 are provided for each maincylinder 11, having spaced rings or bands of card clothing 17. The directions of rotation of the main cylinder and the dofling roll 10Y are as indicated by arrows' in Fig. 1. The fibres on the cylinder 11 are carried over from the cardfclothing on the main cylinder 11 to that on the doliing roll 12. At the point at which these fibres are transferred to the dofling roll 12 the members 20 are retracted so that the.

positioned upon the adjacentouter end surfaces of the members andy may be laid directly upon the condenser bands 19 without any tension or pulling of the fibres from the needles. Preferably the members 20 are of material thickness and fill up the major portion of the -space on the roll 12 between the needles of the card clothing 17. The fibres desposited on the needles of the doffing roll clothing 17 are therefore supported by and rest upon the outer edges of these members. During the movement outwardl of the members 20, the roller 32 engages the fibres while resting upon the end surfaces of these members so that the g fibres are com ressed and made t adh 17 on cylinder 12. At the oint of the pe-- p 0 ere more closely together. The thin band of short fibres may therefore be carded and advanced to the condenser bands Without any y ing thereon, plate-like members interposed between and parallel to the needles of said clothing for supporting and stripping the fibres being carded from said needles, and means to move said members a portion of their width along said needles during the rotation of said cylinder. l

2. A doing roll for carding machines comprising in combination, a cylinder, card clothing thereon, spaced plate-like members interposed between and parallel to the needles of said clothing for supporting and stripping s the fibres being carded from said needles, a cylinder eccentric to said first cylinder, and means on said last mentioned cylinder for moving said spaced members a portion of their width along said needles during 'the rotation of said first cylinder.

3. A doling rolljor carding. machines comprising in combination, a cylinder, spaced annular strips of card 'clothing thereon, members interposed lbetween the needles of' said clothing for supporting and stripping the-libres being carded from said needles, means to move said members *alongV said needles, and means between said annular strips ofy card clothing to retain said members in operative position.

4. A doiing roll for carding machines comprising in combination, a cylinder, card clothing thereon, plate-like members interth said members being adapted to substantially ill the space between said needles, and means to move said members during the rotation of the cylinder whereby the outer ends of said members move from within to positions beyond the ree ends of said needles, other portions of said members remaining between the needles.

5. A doliing roll for carding machines comprising in combination, a cylinder, card clothing thereon, members interposed between the needles of said clothing or supporting and stripping the fibres being carded from said needles, projections on said members,l bands engaging the inner and outer surfaces of said projections, and means engagmg said bands to move said members along said needles during the rotation of said cylinder;

l 6. A doiiing roll'for carding machines comprising in combination, a cylinder, card clothing thereon, members interposed between the needles of said clothing for supporting and stripping the fibresl being carded from said needles, means to move Vsaid members a portion of their width along said needles from between'to partially beyond the needles during the rot tion of @said cylinder, and a roll adjacent `to the clothing of said cylinder, said roll being positioned adjacent the cylinder substantially at that point where said members project beyond the free ends of said needles.

7. A carding machine comprising in combination, a base, a main cylinder rotatable thereon, a doer roll adjacent said main cyl inderv and rotatable on said base, card clothing'- on said cylinder and roll, members interposed between and parallel to the needles of said card clothing, positive means to move said members relative to said needles, said members being within said needles when closely adjacent said cylinder and movable to extend partially beyond the outer ends of said needles as said needles are rotated away from said main cylinder.

8. A doiiing roll for carding machines coml eir movement outward to compress and solidify the fibres being carded. j

ln testimony whereof, I hereto affix my signature.

prising in combination, acylinder, card clothj ing thereon, members interposed between the needles of said clothing for 'supporting and stripping the fibres being carded' from said needles, means to move said members ialong ,said needles during the rotation of said cylinder to extend partially beyond said needles in one positionof said doiing roll, and means adjacent the doiiingv roll andk substantially in contact with the outer ends vof. the needles of thecard .clothing and positioned substantially at that point where said members project beyond the :free ends of said needles on ERNEST L. CADY. 

